Technics SLEH 770 Schematics

Page 1

AD010203502$

Service Manual

Service Schematics

This publication consists of schematics for product
identified in the schematics. It is not intended as a
substitute for a service manual, which is available from
MATSUSHITA in CD or print format. For proper repair
instructions it is neccessary to consult the CD or print
version of the full service manual.

Compact Disc Player

SL-EH77O

Traverse Deck: FtAE01522 Mechanism
senes

Because of unique interconnecting cables, when a component CD Changer
requires service, send or bring in the entire system.

Specifications

Audio section
No. of channels:
Frequency response:

Output voltage:
Dynamic range:
SIN:

Total harmonic distortion:

Wow and flutter:
Digital fl Iter:

DA converter:
Output Impedance:
Load Impedance:

Pickup section
Wavelength:

2 (left and right. stereo)
20 to 20,000 Hz

(+05 dB to -2 dB)
0.78 V (at 0 dB)

85 dB

95 dB

0.02 /u (1 kHz, 0 dB)
Below measurable limit
8 is

1 bit DAC MASH

1 k5)

More than 10 k0

780 nm

Colour

(S) .......... Silver Type

Area

(E). .Eu rope.

System SC-EH170
Sound Processor SH-EH770
Tuner/Amplifier SA-EH770
SL-EH770

Cassette Deck Rs-DVZSO
Front Speakers SB-DV250

Center Speaker SB-PCQS
Surround Speakers SB-P595
: Made in Spain,

General
Dimensions (WxHxD): 293x89x288 mm
Mass: 2.2 kg

Notes: Specifications are subject to change without notice.
Mass and dimensions are approximate.
Total harmonic distortion is measured by the digital spectrum
analyzer.

Note on CD-R and wow

This unit can play CDVDA format audio CD-R and CD-RW that have

been tinalized' upon completion of recording. It may not be able to

play some CD-R or CD-FiW due to the condition of recording.

Finalizing is a process that enables CD-Ft/CD-RW players to play
audio CD-R and CD-RW.

A WARNING

This service information is designed tor experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to adwse non-technical indwiduals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians, Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

CONTENTS

Page

1 Schematic Diagram Notes rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr 2

TechnicS

Page

2 Schematic Diagram ---------------------------------------------------------------- 3

© 2001 Matsushita Electric Industrial Co Ltd All
rights reserved. Unauthorized copying and
distribution is a violation of law.

Page 2

1

Schematic Diagram Notes

This schematic diagram may be modified at any time
with the development of new technology.

Notes:
$1: Tray position 1 detect switch in OFF
position
52: Tray position 2 detect switch in OFF
position
33: Tray open detect switch in OFF position
34: Clump switch in OFF position
35: Bottom switch in OFF position
5601: Disc direct open switch
(DIRECT OPEN DISC 5)
5602: Disc direct open switch
(DIRECT OPEN DISC 4)
5603: Disc direct open switch
(DIRECT OPEN DISC 3)
5604: Disc direct open switch
(DIRECT OPEN DISC 2)
5605: Disc direct open switch
(DIRECT OPEN DISC 1)
5606: Disc select switch (DISC 1)
5607: Disc select switch (DISC 2)
3608: Disc select switch (DISC 3)
3609: Disc select switch (DISC 4)
5610: Disc select switch (DISC 5)
5611: Disc tray open/close switch
( A OPEN/CLOSE)
5612: Pause switch ( II )
5613: F.3kip/search switch ( »/>>l )
5614: Play switch( > )
8615: Stop switch( I )
$616: R.Sklp/search switch ( K4/« )
8617: Random play switch (RANDOM)
$618: Repeat switch (REPEAT)
8619: CD edlt switch (EDIT)
5701: Rest detect switch in OFF position

Indicated voltage values are the standard values for the unit
measured by the DC electronic circuit tester (high-
impedance) with the chassis taken as standard Therefore,
there may exist some errors in the voltage values,
depending on the internal impedance of the DC circuit
tester.

No mark : CD Stop
( ) : CD Play [1 kHz. L+R, 0 dB}

- Important safety notice:

-The supply part number is described alone

Components identified by A mark have
characteristics important for safety.
Furthermore, special parts which have purposes of tire-

retardant (resistors), high-quality sound (capacitors), low-
noise (resistors). etc. are used.

special

When replacing any of components. be sure to use only
manutacturefs specified parts shown in the parts llst.

In the
replacement parts list.

- Caution!

IC and LSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during

repair.

Cover the parts boxes made of plastics with aluminum foil.
Ground the soldering iron.

Put a conductive mat on the work table.

Do not touch the legs of IC or LSI with the fingers directly.

- Voltage and signal line

: Positive voltage line
: CD signal line

*
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